Car-door lock



(Modem I r G. W. PRESTON.

OAR, DOOR oom No 244,665. Patented July 19, 1881..

T :l P5 j- XW wwwm as more fully hereinafter specified.

UNITED STATES,

PATENT O FICE.

CHARLES W. PRESTON, OF- FORT WAYNE, INDIANA.

CAR-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 244,665, dated July 19, 1881.

V I Application filed May 2, 1881. (ModeL) To all whom 'it'may concern:

Be it known that I, CHARLES W. PRESTON, of Fort Wayne, in the county of Allen, and in the State of Indiana, have invented certain new and useful Improvements in Oar-Door Locks; and I do hereby declare that the followin g is a full, clear, and exact description thereof, reference being had to the accompanying thereon, making a part of this specification.

This invention relates to certain improvements in car-doorlocks; and it has for its objects to provide a lock that will be simple, durable, and inexpensive in construction, that will possess great strength, and that will be thoroughly protected from rain, snow, and dust,

jects I attain by the devices illustrated in the accompanying drawings, which represent a front view of a car-door and my'improved lock with the front of the casin g broken away,

showing the working parts of the lock,

Figure 1 represents the car-door and fastening devices; Fig. 2, a sectional view when the door is locked; Fig. 3, a sectional view of the devices before looking; Fig. 4, ahorizontal view of the latter. p

The letterAindicates the car-door, which is adapted to slide in horizontal ways B at the top and bottom of the car. i

The letter 0 indicates the lock-casing, havin g vertical ways D, in which is adapted to work a vertical rectangular rod, E, which passes through aslot, F, .in a loose tumbler, G, and has secured to it a rigid tumbler, H. The aperture in the tumbler G has beveled bearing-edges g, which permit it to rock on bar E. The tumbler Gr rests upon a friction-roller, I, securedto a bolt, K, in the lock-casing, the said roller serying as a fulcrum upon which the tumbler G rests and is adapted to work.

The letter L indicates a loose block interposed between the rear ends of the tumblers, whereby the lower tumbler is operated.

The vertical rectangular bar E is provided These ob;

with a rectangular bolt, M, which is adapted to work through a rectangular staple, N, attached to the car. The said bolt M is provided with an eye, P, through which the hasp of the padlock Q may be passed for the purpose of locking the parts.

The tumblers are provided with serrated catches R, which are beveled at their forward sides to permit of the automatic entrance of the serrated bolt S, attached to the door, the serrated portions being beveled at their forward sides, so as to enter readily between the tumblers. A short distance above the bolt is formed an aperture, T, by means of which a seal may be attached.

The operation of my invention is as follows: Upon closing the door the serrated bolt secured thereto forces the tumblers apart, lifting the upper one, and with it the vertical rod, until the bolt is forced home, when the tumblers close upon and hold said bolt, the vertical rod dropping until the eye in the square bolt falls below the staple, after which the padlock is passed through said eye and fastened, thus securely looking all theparts.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

The combination, with the sliding door provided with a serrated bolt, of the fast and loose tumblers, the vertically-sliding rod working in ways in the lock-casing, the loose block located between the rear ends of the tumblers, the fulcrum for the lower tumbler, and the rectangular bolt at the lower end of the vertical rod, and staple through which it passes, and v locking devices, substantially as herein specified.

'In testimony that I claim the foregoing I have hereunto set my hand this 12th day of April, 1881.

Witnesses W. .LKERR,

HENRY MOGK.

. CHARLES w. PRESTON. 

